The reason I tell you about comments now, is that before now, we di not need comments. Now the programs are getting big enough, so that for people reading our programs can understand whats happening.
To make a comment, just put a number sign: #, followed by your comment. Example:

#you can write anything in a comment! BKHFFHafhekJKHRFuiahkeHKFHiu

	The python interpreter completly ignores what is inside a comment.